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            <h1 style="display: none">React笔记（三）</h1>
            
            
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                <h3 id="redux：集中式状态管理"><a href="#redux：集中式状态管理" class="headerlink" title="redux：集中式状态管理"></a>redux：集中式状态管理</h3><p>中文文档：<a target="_blank" rel="noopener" href="https://www.redux.org.cn/">https://www.redux.org.cn/</a></p>
<p><img src="/noteImg/react-redux.png" srcset="/img/loading.gif" lazyload> </p>
<p>react-redux：</p>
<figure class="highlight pf"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br></pre></td><td class="code"><pre><code class="hljs pf"><span class="hljs-number">1</span>.引入：<br>import &#123;useDispatch,useSelector&#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;react-redux&quot;</span><br><span class="hljs-number">2</span>.拿到数据：<br><span class="hljs-keyword">const</span> count = useSelector((<span class="hljs-keyword">state</span>) =&gt; <span class="hljs-keyword">state</span>.count);<br><span class="hljs-number">3</span>.修改数据：<br><span class="hljs-keyword">const</span> dispatch = useDispatch();<br>dispatch(&#123; type: <span class="hljs-string">&quot;add&quot;</span> &#125;);<br></code></pre></td></tr></table></figure>



<p>RTK改善Redux</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><code class="hljs javascript"><span class="hljs-comment">// ./store/index.js</span><br><span class="hljs-keyword">import</span> &#123;configureStore&#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;@reduxjs/toolkit&quot;</span><br><span class="hljs-keyword">import</span> counterReducer <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;./modules/counter&quot;</span><br><span class="hljs-keyword">import</span> messageReducer <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;./modules/message.js&quot;</span><br><br><span class="hljs-keyword">const</span> store = <span class="hljs-title function_">configureStore</span>(&#123;<br>    <span class="hljs-attr">reducer</span>:&#123;<br>        <span class="hljs-attr">counter</span>: counterReducer,<br>        <span class="hljs-attr">message</span>:messageReducer<br>    &#125;<br>&#125;)<br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> store<br></code></pre></td></tr></table></figure>

<figure class="highlight pf"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br></pre></td><td class="code"><pre><code class="hljs pf">// ./stroe/modules/counter.js<br>import &#123; createSlice &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;@reduxjs/toolkit&quot;</span><br><br><span class="hljs-keyword">const</span> countSlice = createSlice(&#123;<br>    name:<span class="hljs-string">&quot;counter&quot;</span>, //命名空间<br>    initialState:&#123;<br>        count:<span class="hljs-number">0</span><br>    &#125;,<br>    reducers:&#123;<br>        inc(<span class="hljs-keyword">state</span>,action)&#123;<br>            <span class="hljs-keyword">state</span>.count = <span class="hljs-keyword">state</span>.count+<span class="hljs-number">1</span><br>        &#125;<br>    &#125;<br><br>&#125;)<br><br>export <span class="hljs-keyword">default</span> countSlice.reducer<br></code></pre></td></tr></table></figure>

<figure class="highlight pf"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br></pre></td><td class="code"><pre><code class="hljs pf">./views/Home<br><br>import React <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;react&quot;</span>;<br>import &#123; useDispatch, useSelector &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;react-redux&quot;</span>;<br><br>export <span class="hljs-keyword">default</span> function Home() &#123;<br>  <span class="hljs-keyword">const</span> dispatch = useDispatch();<br>  <span class="hljs-keyword">const</span> handleClick = () =&gt; &#123;<br>    dispatch(&#123;<br>        type:<span class="hljs-string">&quot;counter/inc&quot;</span><br>    &#125;)<br>    dispatch(&#123;<br>        type:<span class="hljs-string">&quot;message/str&quot;</span><br>    &#125;)<br>  &#125;;<br>  <span class="hljs-keyword">const</span> count = useSelector((<span class="hljs-keyword">state</span>) =&gt; <span class="hljs-keyword">state</span>.counter.count);<br>  <span class="hljs-keyword">const</span> msg = useSelector((<span class="hljs-keyword">state</span>) =&gt; <span class="hljs-keyword">state</span>.message.msg);<br>  return (<br>    <span class="hljs-variable">&lt;&gt;</span><br>      <span class="hljs-variable">&lt;button onClick=&#123;handleClick&#125;&gt;</span><span class="hljs-number">123</span>&lt;/button&gt;<br>      <span class="hljs-variable">&lt;div&gt;</span>Home-----------&#123;count&#125;-----&#123;msg&#125;&lt;/div&gt;<br>    &lt;/&gt;<br>  );<br>&#125;<br><br></code></pre></td></tr></table></figure>



<p>处理异步：</p>
<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><code class="hljs javascript"><span class="hljs-comment">// ./stroe/modules/counter.js</span><br><span class="hljs-keyword">import</span> &#123; createSlice, createAsyncThunk &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;@reduxjs/toolkit&quot;</span><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">const</span> counterTestAction = <span class="hljs-title function_">createAsyncThunk</span>(<span class="hljs-string">&quot;counter/testAction&quot;</span>,<span class="hljs-keyword">async</span> ()=&gt;&#123;<br>    <span class="hljs-keyword">const</span> ret = <span class="hljs-keyword">await</span> <span class="hljs-keyword">new</span> <span class="hljs-title class_">Promise</span>(<span class="hljs-function">(<span class="hljs-params">res</span>) =&gt;</span> &#123; <br>      <span class="hljs-comment">/* 函数体 */</span><br>       <span class="hljs-built_in">setTimeout</span>(<span class="hljs-function">() =&gt;</span> &#123; <br>         <span class="hljs-comment">/* 函数体 */</span><br>        <span class="hljs-title function_">res</span>(<span class="hljs-string">&quot;123&quot;</span>)  <br>       &#125;,<span class="hljs-number">2000</span>)<br>    &#125;)<br><br>    <span class="hljs-keyword">return</span> ret<br>&#125;)<br></code></pre></td></tr></table></figure>

<figure class="highlight javascript"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><code class="hljs javascript">./views/<span class="hljs-title class_">Home</span><br><span class="hljs-keyword">import</span> &#123; counterTestAction &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;../../store/modules/counter&quot;</span>; <br><span class="hljs-title function_">dispatch</span>(<span class="hljs-title function_">counterTestAction</span>()).<span class="hljs-title function_">then</span>(<span class="hljs-function">(<span class="hljs-params">res</span>) =&gt;</span> &#123; <br>      <span class="hljs-comment">/* 函数体 */</span><br>      <span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(res.<span class="hljs-property">payload</span>);  <span class="hljs-comment">//123</span><br>    &#125;)<br></code></pre></td></tr></table></figure>



<h3 id="react与ts配合-—-props"><a href="#react与ts配合-—-props" class="headerlink" title="react与ts配合 — props"></a>react与ts配合 — props</h3><figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// 方式一：</span><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">WelcomeProps</span> &#123;<br>    msg?: <span class="hljs-built_in">string</span>,  <span class="hljs-comment">// ？为可选类型 不传递也可以</span><br>    <span class="hljs-attr">count</span>: <span class="hljs-built_in">number</span>,<br>    <span class="hljs-attr">arr</span>:<span class="hljs-built_in">string</span>[],<br>    <span class="hljs-attr">info</span>:&#123;<span class="hljs-attr">username</span>: <span class="hljs-built_in">string</span>; <span class="hljs-attr">age</span>: <span class="hljs-built_in">number</span>&#125;,<br>    <span class="hljs-comment">// 字面量类型进行指定值限定</span><br>    status?:<span class="hljs-string">&quot;loading&quot;</span> | <span class="hljs-string">&quot;success&quot;</span> | <span class="hljs-string">&quot;error&quot;</span> <br>&#125;<br><br><span class="hljs-keyword">function</span> <span class="hljs-title function_">Welcome</span>(<span class="hljs-params">props: WelcomeProps</span>) &#123;<br>    <span class="hljs-comment">// 可以解构添加默认值</span><br>    <span class="hljs-keyword">const</span> &#123;msg = <span class="hljs-number">0</span>&#125; = props<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            Welcome</span><br><span class="language-xml">            msg:&#123;props.msg&#125;,&#123;props.count&#125;,&#123;props.arr&#125;,&#123;props.info.age&#125;</span><br><span class="language-xml">        	&#123;msg&#125;</span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><span class="hljs-comment">//默认值</span><br><span class="hljs-title class_">Welcome</span>.<span class="hljs-property">defaultProps</span> = &#123;<br>    <span class="hljs-attr">msg</span>:<span class="hljs-string">&quot;asss&quot;</span><br>&#125;<br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">App</span>(<span class="hljs-params"></span>) &#123;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">h2</span>&gt;</span>01_react-ts<span class="hljs-tag">&lt;/<span class="hljs-name">h2</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span> <span class="hljs-attr">msg</span>=<span class="hljs-string">&quot;123&quot;</span> <span class="hljs-attr">count</span>=<span class="hljs-string">&#123;123&#125;</span> <span class="hljs-attr">arr</span>=<span class="hljs-string">&#123;[</span>&quot;<span class="hljs-attr">1</span>&quot;,&quot;<span class="hljs-attr">2</span>&quot;,&quot;<span class="hljs-attr">3</span>&quot;]&#125; <span class="hljs-attr">info</span>=<span class="hljs-string">&#123;&#123;username:</span>&quot;<span class="hljs-attr">tom</span>&quot;,<span class="hljs-attr">age:12</span>&#125;&#125;/&gt;</span></span><br><span class="language-xml">            // 字面量类型进行指定值（status）限定  只能是&quot;loading&quot;、&quot;success&quot;、&quot;error&quot; </span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span> <span class="hljs-attr">status</span>=<span class="hljs-string">&quot;&quot;</span> /&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br><br></code></pre></td></tr></table></figure>

<figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// 方式二：</span><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><span class="hljs-keyword">import</span> <span class="hljs-keyword">type</span> &#123; <span class="hljs-variable constant_">FC</span> &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">WelcomeProps</span> &#123;<br>    <span class="hljs-attr">msg</span>: <span class="hljs-built_in">string</span><br>&#125;<br><br><span class="hljs-keyword">const</span> <span class="hljs-title class_">Welcome</span>: <span class="hljs-variable constant_">FC</span>&lt;<span class="hljs-title class_">WelcomeProps</span>&gt; = <span class="hljs-function">(<span class="hljs-params">props</span>) =&gt;</span> &#123;<br>    <span class="hljs-comment">/* 函数体 */</span><br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            Welcome</span><br><span class="language-xml">            msg:&#123;props.msg&#125;</span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">App</span>(<span class="hljs-params"></span>) &#123;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">h2</span>&gt;</span>01_react-ts<span class="hljs-tag">&lt;/<span class="hljs-name">h2</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span> <span class="hljs-attr">msg</span>=<span class="hljs-string">&quot;123&quot;</span> /&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br></code></pre></td></tr></table></figure>



<hr>
<h3 id="react与ts配合-—-children与event限制"><a href="#react与ts配合-—-children与event限制" class="headerlink" title="react与ts配合 — children与event限制"></a>react与ts配合 — children与event限制</h3><figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// children 插槽：</span><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">WelcomeProps</span> &#123;<br><span class="hljs-comment">// type React.ReactNode = string | number | boolean | React.ReactElement&lt;any, string | React.JSXElementConstructor&lt;any&gt;&gt; | Iterable&lt;React.ReactNode&gt; | React.ReactPortal | null | undefined</span><br>    children?: <span class="hljs-title class_">React</span>.<span class="hljs-property">ReactNode</span><br>&#125;<br><br><span class="hljs-keyword">function</span> <span class="hljs-title function_">Welcome</span>(<span class="hljs-params">props: WelcomeProps</span>) &#123;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            Welcome &#123;props.children&#125;</span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">App</span>(<span class="hljs-params"></span>) &#123;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">h2</span>&gt;</span>02_react-ts<span class="hljs-tag">&lt;/<span class="hljs-name">h2</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span>&gt;</span></span><br><span class="language-xml">                <span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span>123<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;/<span class="hljs-name">Welcome</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span>&gt;</span></span><br><span class="language-xml">                123</span><br><span class="language-xml">            <span class="hljs-tag">&lt;/<span class="hljs-name">Welcome</span>&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br></code></pre></td></tr></table></figure>

<figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// event：</span><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">WelcomeProps</span> &#123;<br>    children?: <span class="hljs-title class_">React</span>.<span class="hljs-property">ReactNode</span>,<br>    handleMessage?: <span class="hljs-function">(<span class="hljs-params">event: React.MouseEvent&lt;HTMLButtonElement&gt;</span>)=&gt;</span><span class="hljs-built_in">void</span><br>&#125;<br><br><span class="hljs-keyword">function</span> <span class="hljs-title function_">Welcome</span>(<span class="hljs-params">props: WelcomeProps</span>) &#123;<br>    <span class="hljs-keyword">const</span> <span class="hljs-title function_">handleChange</span> = (<span class="hljs-params">ev:React.ChangeEvent&lt;HTMLInputElement&gt;</span>) =&gt; &#123; <br>      <span class="hljs-comment">/* 函数体 */</span><br>       <span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(ev);<br>       <br>    &#125;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            Welcome &#123;props.children&#125;</span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">button</span> <span class="hljs-attr">onClick</span>=<span class="hljs-string">&#123;props.handleMessage&#125;</span>&gt;</span>handleMessage<span class="hljs-tag">&lt;/<span class="hljs-name">button</span>&gt;</span></span><br><span class="language-xml">            &#123;/* 由于React.MouseEvent<span class="hljs-tag">&lt;<span class="hljs-name">HTMLButtonElement</span>&gt;</span>指定了 所以只能button使用此函数 */&#125;</span><br><span class="language-xml">            &#123;/* <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">onClick</span>=<span class="hljs-string">&#123;props.handleMessage&#125;</span>&gt;</span>handleMessage<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span> */&#125;</span><br><span class="language-xml"></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">input</span> <span class="hljs-attr">onChange</span>=<span class="hljs-string">&#123;handleChange&#125;</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">input</span>&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">    )</span><br><span class="language-xml">&#125;</span><br><span class="language-xml"></span><br><span class="language-xml"></span><br><span class="language-xml">export default function App() &#123;</span><br><span class="language-xml">    return (</span><br><span class="language-xml">        <span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">h2</span>&gt;</span>02_react-ts<span class="hljs-tag">&lt;/<span class="hljs-name">h2</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span> <span class="hljs-attr">handleMessage</span>=<span class="hljs-string">&#123;(event)</span>=&gt;</span>&#123;alert(&quot;123&quot;)&#125;&#125;&gt;</span><br><span class="language-xml">                <span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span>123<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;/<span class="hljs-name">Welcome</span>&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">    )</span><br><span class="language-xml">&#125;</span><br><span class="language-xml"></span><br><span class="language-xml"></span><br></code></pre></td></tr></table></figure>

<hr>
<h3 id="react与ts配合-—-style与component限制"><a href="#react与ts配合-—-style与component限制" class="headerlink" title="react与ts配合 — style与component限制"></a>react与ts配合 — style与component限制</h3><figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">WelcomeProps</span> &#123;<br>    <span class="hljs-attr">style</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">CSSProperties</span><br>    <span class="hljs-attr">component</span>: <span class="hljs-title class_">React</span>.<span class="hljs-property">ComponentType</span>&lt;<span class="hljs-title class_">HeaderProps</span>&gt;<br>&#125;<br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">HeaderProps</span> &#123;<br>    <span class="hljs-attr">username</span>:<span class="hljs-built_in">string</span><br>&#125;<br><br><span class="hljs-keyword">function</span> <span class="hljs-title function_">Welcome</span>(<span class="hljs-params">props: WelcomeProps</span>) &#123;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            Welcome </span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">props.component</span> <span class="hljs-attr">username</span>=<span class="hljs-string">&#x27;tom&#x27;</span>/&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br><span class="hljs-keyword">function</span> <span class="hljs-title function_">Header</span>(<span class="hljs-params">props:HeaderProps</span>) &#123;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            Header &#123;props.username&#125;</span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">App</span>(<span class="hljs-params"></span>) &#123;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">h2</span>&gt;</span>03_react-ts<span class="hljs-tag">&lt;/<span class="hljs-name">h2</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span> <span class="hljs-attr">style</span>=<span class="hljs-string">&#123;&#123;</span>&quot;<span class="hljs-attr">border</span>&quot;<span class="hljs-attr">:</span>&quot;<span class="hljs-attr">1px</span> <span class="hljs-attr">red</span> <span class="hljs-attr">solid</span>&quot;, <span class="hljs-attr">display:</span> &quot;<span class="hljs-attr">none</span>&quot;&#125;&#125; <span class="hljs-attr">component</span>=<span class="hljs-string">&#123;Header&#125;/</span>&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br></code></pre></td></tr></table></figure>

<hr>
<h3 id="react与ts配合-—-use函数的限制"><a href="#react与ts配合-—-use函数的限制" class="headerlink" title="react与ts配合 — use函数的限制"></a>react与ts配合 — use函数的限制</h3><p>useState()、useEffect()、useRef()</p>
<figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">//useState()</span><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span>, &#123; useState &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">WelcomeProps</span> &#123;<br>&#125;<br><br><span class="hljs-keyword">function</span> <span class="hljs-title function_">Welcome</span>(<span class="hljs-params">props: WelcomeProps</span>) &#123;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            Welcome </span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br><span class="hljs-keyword">type</span> <span class="hljs-title class_">Info</span> = &#123;<span class="hljs-attr">username</span>:<span class="hljs-built_in">string</span>&#125;<br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">App</span>(<span class="hljs-params"></span>) &#123;<br>    <span class="hljs-comment">// const [count,setCount] = useState(0)</span><br>    <span class="hljs-comment">// const [count,setCount] = useState&lt;number | string&gt;(0) //泛型 number | string</span><br>    <span class="hljs-comment">// const [count,setCount] = useState&lt;number[]&gt;([]) //泛型 数组</span><br>    <span class="hljs-comment">// const [count,setCount] = useState&lt;&#123;username:string&#125; | null&gt;(null) //泛型 对象</span><br>    <span class="hljs-keyword">const</span> [count,setCount] = useState&lt;<span class="hljs-title class_">Info</span>&gt;(&#123;&#125; <span class="hljs-keyword">as</span> <span class="hljs-title class_">Info</span>) <span class="hljs-comment">//泛型 对象  方式二（少用）</span><br>    <span class="hljs-keyword">const</span> <span class="hljs-title function_">handleClick</span> = (<span class="hljs-params"></span>) =&gt; &#123; <br>      <span class="hljs-comment">/* 函数体 */</span><br>      <span class="hljs-title function_">setCount</span>(&#123;<span class="hljs-string">&quot;username&quot;</span>:<span class="hljs-string">&quot;tom&quot;</span>&#125;)<br>    &#125;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">h2</span>&gt;</span>04_react-ts<span class="hljs-tag">&lt;/<span class="hljs-name">h2</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">h3</span>&gt;</span>&#123;count.username&#125;<span class="hljs-tag">&lt;/<span class="hljs-name">h3</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">button</span> <span class="hljs-attr">onClick</span>=<span class="hljs-string">&#123;handleClick&#125;</span>&gt;</span>dianji<span class="hljs-tag">&lt;/<span class="hljs-name">button</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span> /&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br></code></pre></td></tr></table></figure>

<figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// useEffect()</span><br>    <span class="hljs-title function_">useEffect</span>(<span class="hljs-function">()=&gt;</span>&#123;<br>        <span class="hljs-keyword">return</span> <span class="hljs-function">()=&gt;</span>&#123;<br>            <br>        &#125;<br>    &#125;,[])<br></code></pre></td></tr></table></figure>

<figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// useRef()</span><br><span class="hljs-keyword">const</span> myRef = useRef&lt;<span class="hljs-title class_">HTMLButtonElement</span>&gt;(<span class="hljs-literal">null</span>)<br>&lt;button onClick=&#123;handleClick&#125; ref=&#123;myRef&#125;&gt;dianji&lt;/button&gt;<br><span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(myRef.<span class="hljs-property">current</span>?.<span class="hljs-property">innerHTML</span>); <span class="hljs-comment">// 可选链（类型保护）</span><br><span class="hljs-variable language_">console</span>.<span class="hljs-title function_">log</span>(myRef.<span class="hljs-property">current</span>!.<span class="hljs-property">innerHTML</span>); <span class="hljs-comment">// 非空断言（慎用）</span><br></code></pre></td></tr></table></figure>

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<h3 id="react与ts配合-—-类组件类型限制"><a href="#react与ts配合-—-类组件类型限制" class="headerlink" title="react与ts配合 — 类组件类型限制"></a>react与ts配合 — 类组件类型限制</h3><figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span>, &#123; <span class="hljs-title class_">Component</span> &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">WelcomeState</span>&#123;<br>    <span class="hljs-attr">username</span>:<span class="hljs-built_in">string</span><br>&#125;<br><span class="hljs-keyword">interface</span> <span class="hljs-title class_">WelcomeProps</span>&#123;<br>    <span class="hljs-attr">msg</span>:<span class="hljs-built_in">string</span><br>&#125;<br><span class="hljs-keyword">class</span> <span class="hljs-title class_">Welcome</span> <span class="hljs-keyword">extends</span> <span class="hljs-title class_ inherited__">Component</span>&lt;<span class="hljs-title class_">WelcomeProps</span>,<span class="hljs-title class_">WelcomeState</span>&gt; &#123; <span class="hljs-comment">//第一个参数 --- props的类型限定 </span><br>    state = &#123;<br>        <span class="hljs-attr">username</span>: <span class="hljs-string">&quot;tom&quot;</span><br>    &#125;<br>    <span class="hljs-title function_">render</span>(<span class="hljs-params"></span>) &#123;<br>        <span class="hljs-keyword">return</span> (<br>            <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span>Welcome-&#123;this.state.username&#125;-&#123;this.props.msg&#125;<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>        )<br>    &#125;<br>&#125;<br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">App</span>(<span class="hljs-params"></span>) &#123;<br><br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">h2</span>&gt;</span>05_react-ts<span class="hljs-tag">&lt;/<span class="hljs-name">h2</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">Welcome</span> <span class="hljs-attr">msg</span>=<span class="hljs-string">&quot;123&quot;</span>/&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br>    )<br>&#125;<br><br></code></pre></td></tr></table></figure>

<hr>
<p>react与ts配合 — 路由</p>
<figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span class="line">27</span><br><span class="line">28</span><br><span class="line">29</span><br><span class="line">30</span><br><span class="line">31</span><br><span class="line">32</span><br><span class="line">33</span><br><span class="line">34</span><br><span class="line">35</span><br><span class="line">36</span><br><span class="line">37</span><br><span class="line">38</span><br><span class="line">39</span><br><span class="line">40</span><br><span class="line">41</span><br><span class="line">42</span><br><span class="line">43</span><br><span class="line">44</span><br><span class="line">45</span><br><span class="line">46</span><br><span class="line">47</span><br><span class="line">48</span><br><span class="line">49</span><br><span class="line">50</span><br><span class="line">51</span><br><span class="line">52</span><br><span class="line">53</span><br><span class="line">54</span><br><span class="line">55</span><br><span class="line">56</span><br><span class="line">57</span><br><span class="line">58</span><br><span class="line">59</span><br><span class="line">60</span><br><span class="line">61</span><br><span class="line">62</span><br><span class="line">63</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-keyword">import</span> &#123; createBrowserRouter &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;react-router-dom&quot;</span>;<br><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;react&quot;</span>;<br><br><span class="hljs-keyword">import</span> <span class="hljs-keyword">type</span> &#123; <span class="hljs-title class_">RouteObject</span> &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;react-router-dom&quot;</span>;<br><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">App</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;../App&quot;</span>;<br><span class="hljs-keyword">import</span> <span class="hljs-title class_">Index</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;../views/Index&quot;</span>;<br><span class="hljs-keyword">import</span> <span class="hljs-title class_">User</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;../views/User&quot;</span>;<br><span class="hljs-keyword">import</span> <span class="hljs-title class_">Login</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;../views/Login&quot;</span>;<br><br><span class="hljs-comment">// interface Meta &#123;</span><br><span class="hljs-comment">//   meta: &#123; title?: string &#125;;</span><br><span class="hljs-comment">// &#125;</span><br><span class="hljs-comment">// // 交叉类型</span><br><span class="hljs-comment">// type Routes = RouteObject &amp; Meta &amp; &#123;</span><br><span class="hljs-comment">//     children: (RouteObject &amp; Meta)[]</span><br><span class="hljs-comment">// &#125;</span><br><br><span class="hljs-keyword">declare</span> <span class="hljs-variable language_">module</span> <span class="hljs-string">&quot;react-router&quot;</span>&#123;<br>    <span class="hljs-keyword">interface</span> <span class="hljs-title class_">NonIndexRouteObject</span>  &#123;<br>        meta?: &#123; <span class="hljs-attr">title</span>: <span class="hljs-built_in">string</span> &#125;,<br>    &#125;<br>    <span class="hljs-keyword">interface</span> <span class="hljs-title class_">IndexRouteObject</span>  &#123;<br>        meta?: &#123; <span class="hljs-attr">title</span>: <span class="hljs-built_in">string</span> &#125;,<br>    &#125;<br>&#125;<br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">const</span> <span class="hljs-attr">routes</span>: <span class="hljs-title class_">RouteObject</span>[] = [<br>  &#123;<br>    <span class="hljs-attr">path</span>: <span class="hljs-string">&quot;/&quot;</span>,<br>    <span class="hljs-attr">element</span>: <span class="hljs-title class_">React</span>.<span class="hljs-title function_">createElement</span>(<span class="hljs-title class_">App</span>),<br>    <span class="hljs-attr">meta</span>: &#123; <span class="hljs-attr">title</span>: <span class="hljs-string">&quot;title&quot;</span> &#125;,<br>    <span class="hljs-attr">children</span>: [<br>      &#123;<br>        <span class="hljs-attr">path</span>: <span class="hljs-string">&quot;index&quot;</span>,<br>        <span class="hljs-attr">element</span>: <span class="hljs-title class_">React</span>.<span class="hljs-title function_">createElement</span>(<span class="hljs-title class_">Index</span>),<br>        <span class="hljs-attr">meta</span>: &#123; <span class="hljs-attr">title</span>: <span class="hljs-string">&quot;title&quot;</span> &#125;,<br>        <span class="hljs-attr">children</span>:[<br>            &#123;<br>                <span class="hljs-attr">path</span>: <span class="hljs-string">&quot;index&quot;</span>,<br>                <span class="hljs-attr">element</span>: <span class="hljs-title class_">React</span>.<span class="hljs-title function_">createElement</span>(<span class="hljs-title class_">Index</span>),<br>                <span class="hljs-attr">meta</span>: &#123; <span class="hljs-attr">title</span>: <span class="hljs-string">&quot;title&quot;</span> &#125;,<br>            &#125;<br>        ]<br>      &#125;,<br>      &#123;<br>        <span class="hljs-attr">path</span>: <span class="hljs-string">&quot;user&quot;</span>,<br>        <span class="hljs-attr">element</span>: <span class="hljs-title class_">React</span>.<span class="hljs-title function_">createElement</span>(<span class="hljs-title class_">User</span>),<br>        <span class="hljs-attr">meta</span>: &#123; <span class="hljs-attr">title</span>: <span class="hljs-string">&quot;title&quot;</span> &#125;<br>      &#125;,<br>      &#123;<br>        <span class="hljs-attr">path</span>: <span class="hljs-string">&quot;login&quot;</span>,<br>        <span class="hljs-attr">element</span>: <span class="hljs-title class_">React</span>.<span class="hljs-title function_">createElement</span>(<span class="hljs-title class_">Login</span>),<br>        <span class="hljs-attr">meta</span>: &#123; <span class="hljs-attr">title</span>: <span class="hljs-string">&quot;title&quot;</span> &#125;<br>      &#125;,<br>    ],<br>  &#125;,<br>];<br><br><span class="hljs-keyword">const</span> router = <span class="hljs-title function_">createBrowserRouter</span>(routes);<br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> router;<br><br></code></pre></td></tr></table></figure>

<hr>
<h3 id="redux-、toolkit状态管理如何使用TS开发"><a href="#redux-、toolkit状态管理如何使用TS开发" class="headerlink" title="redux 、toolkit状态管理如何使用TS开发"></a>redux 、toolkit状态管理如何使用TS开发</h3><figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// store/index.ts</span><br><span class="hljs-keyword">import</span> &#123;configureStore&#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;@reduxjs/toolkit&quot;</span><br><span class="hljs-keyword">import</span> userReducer <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;./modules/user&quot;</span><br><br><span class="hljs-keyword">const</span> store = <span class="hljs-title function_">configureStore</span>(&#123;<br>    <span class="hljs-attr">reducer</span>:&#123;<br>        <span class="hljs-attr">user</span>:userReducer<br>    &#125;<br>&#125;)<br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">type</span> <span class="hljs-title class_">RootState</span> = <span class="hljs-title class_">ReturnType</span>&lt;<span class="hljs-keyword">typeof</span> store.<span class="hljs-property">getState</span>&gt;<br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> store<br></code></pre></td></tr></table></figure>

<figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// store/modules/user.ts</span><br><span class="hljs-keyword">import</span> &#123;createSlice&#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;@reduxjs/toolkit&quot;</span><br><span class="hljs-keyword">import</span> <span class="hljs-keyword">type</span> &#123;<span class="hljs-title class_">PayloadAction</span>&#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;@reduxjs/toolkit&quot;</span><br><br><span class="hljs-keyword">const</span> userSlice = <span class="hljs-title function_">createSlice</span>(&#123;<br>    <span class="hljs-attr">name</span>:<span class="hljs-string">&quot;user&quot;</span>,<br>    <span class="hljs-attr">initialState</span>:&#123;<br>        <span class="hljs-attr">name</span>:<span class="hljs-string">&quot;tom&quot;</span>,<br>    &#125;,<br>    <span class="hljs-attr">reducers</span>:&#123;<br>        <span class="hljs-title function_">change</span>(<span class="hljs-params">state,action:PayloadAction&lt;<span class="hljs-built_in">string</span>&gt;</span>)&#123;<br>            state.<span class="hljs-property">name</span> = action.<span class="hljs-property">payload</span><br>        &#125;<br>    &#125;<br>&#125;)<br><span class="hljs-keyword">export</span> <span class="hljs-keyword">const</span> &#123;change&#125; = userSlice.<span class="hljs-property">actions</span><br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> userSlice.<span class="hljs-property">reducer</span><br></code></pre></td></tr></table></figure>

<figure class="highlight tsx"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br></pre></td><td class="code"><pre><code class="hljs tsx"><span class="hljs-comment">// views/Index/index.tsx</span><br><span class="hljs-keyword">import</span> <span class="hljs-title class_">React</span> <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;react&#x27;</span><br><span class="hljs-keyword">import</span> &#123; useDispatch, useSelector &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;react-redux&quot;</span><br><span class="hljs-keyword">import</span> <span class="hljs-keyword">type</span> &#123; <span class="hljs-title class_">RootState</span> &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&quot;../../store&quot;</span><br><span class="hljs-keyword">import</span> &#123; change &#125; <span class="hljs-keyword">from</span> <span class="hljs-string">&#x27;../../store/modules/user&#x27;</span><br><br><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> <span class="hljs-keyword">function</span> <span class="hljs-title function_">Index</span>(<span class="hljs-params"></span>) &#123;<br>    <span class="hljs-keyword">const</span> name = <span class="hljs-title function_">useSelector</span>(<span class="hljs-function">(<span class="hljs-params">state: RootState</span>) =&gt;</span> state.<span class="hljs-property">user</span>.<span class="hljs-property">name</span>)<br>    <span class="hljs-keyword">const</span> dispatch = <span class="hljs-title function_">useDispatch</span>()<br>    <span class="hljs-keyword">const</span> <span class="hljs-title function_">handleClick</span> = (<span class="hljs-params"></span>) =&gt; &#123;<br>        <span class="hljs-comment">/* 函数体 */</span><br>        <span class="hljs-comment">// dispatch(&#123;type:&quot;user/change&quot;, payload:&quot;jack&quot;&#125;)  // 对payload限制不了类型</span><br>        <span class="hljs-title function_">dispatch</span>(<span class="hljs-title function_">change</span>(<span class="hljs-string">&quot;jack&quot;</span>))  <span class="hljs-comment">// 对payload限制类型</span><br>    &#125;<br>    <span class="hljs-keyword">return</span> (<br>        <span class="language-xml"><span class="hljs-tag">&lt;&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">div</span>&gt;</span>Index _ &#123;name&#125;<span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span></span><br><span class="language-xml">            <span class="hljs-tag">&lt;<span class="hljs-name">button</span> <span class="hljs-attr">onClick</span>=<span class="hljs-string">&#123;handleClick&#125;</span>&gt;</span>dainji<span class="hljs-tag">&lt;/<span class="hljs-name">button</span>&gt;</span></span><br><span class="language-xml">        <span class="hljs-tag">&lt;/&gt;</span></span><br>    )<br>&#125;<br><br></code></pre></td></tr></table></figure>








                
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